Rotate or flip objects
A rotated
or flipped object pivots on its center point.

To create the illusion of perspective, suggesting
that an object has rotated in three dimensions, see
Skew objects.
Rotate a selected object 90° or 180°
Select Modify > Transform and select
a Rotate command from the submenu.
Rotate a selected object by dragging
Select any transformation tool.
Move the pointer outside the object until the rotation pointer
appears.
Drag to rotate the object.

To constrain rotation
to 15° increments relative to the horizon, Shift-drag the pointer.
Double-click inside the window or press Enter to apply the
changes.
Relocate the axis of rotation
Drag the center point away from the center.
Reset the axis of rotation to the center of the selection

Do one of the following:
Flip an object while maintaining relative position
Select Modify > Transform >
Flip Horizontal or Flip Vertical.